A guy crashed into someone in his truck, they died, that death still haunts him it was their fault but all he could remember, all that he couldn't forget was the look in their eyes because they knew they were dead. It haunts people when it's involentary. Since he was in a Portugese truck, it was most probobly driving at 62mph with more weight in the trailer than UK regulations allow anyway, it's normally the case. Then you have a truck that is heavier, and faster than any other UK truck. Meaning that drivers may underestimate the speed and lack of stopping power of the truck.